Description_x000D_ General description_x000D_ FRK (fyn-related kinase) is a tyrosine kinase, with a molecular weight of 54kDa. It contains SH2 and SH3 (src homology) domains. It is predominantly expressed in tissues of epithelial origin such as, liver, kidney, breast and colon. Its SH2 domain contains a putative bipartite nuclear localization signal._x000D_ Biochem/physiol Actions_x000D_ FRK (fyn-related kinase) controls growth by phosphorylating perinuclear proteins. It inhibits cell growth both in a pRb (retinoblastoma)-dependent and independent manner. It cause cell cycle arrest at G1 phase in breast cancer cells. Certain mutations in this gene lead to its constitutive activation, as seen in hepatocellular adenomas. Its up-regulation in gliomas prevents both invasiveness and migration of glioma cells. This is attributable to its promotion of N-cadherin/β-catenin complex formation._x000D_ Physical form_x000D_ Supplied in 50 mM Tris-HCl, pH 7.5, with 150 mM NaCl, 0.2 5mM DTT, 0.1 mM EGTA, 0.1 mM EDTA, 0.1 mM PMSF, and 25% glycerol._x000D_ Legal Information_x000D_ PRECISIO is a registered trademark of Sigma-Aldrich Co. LLC